Just as I was leaving Xmarks this morning, my monitor popped up a message, saying, "signal lost". A few seconds later, my computer shut down. I unplugged the power cable and turned off the switch on the back of the power supply.Afrer about 5 minutes, I plugged it back in and turned on the power supply switch. The fan on the supply started, and the leds came on. A few seconds later the fan and lights shut off. I cleaned out the computer and power supply. It has been pretty dusty around here with the drought. It had some dust,but not bad since I cleaned everything last month.But that didn't help.I guess the power supply died.(At least I hope it's the supply)